# File lib/rubygems/package.rb, line 617
    def zipped_stream(entry)
      if Zlib::ZLIB_VERSION <= '1.2.1'
        zis = Zlib::GzipReader.new entry
        dis = zis.read
        is = StringIO.new(dis)
      else
        is = Zlib::GzipReader.new entry
      end
    ensure
      zis.finish if zis
    end